Process of making ferro-nickel and nickel-steel.



, To all whom it may 50mm I description.

FRANKLIN n. (,ARPEN-TER,

some

OF DENVER, COLORADO.

PnocEss OF'MAKING FERRO-NiCKEL Ann. Mont-sweet. 4

Be it known that I, FRANKLIN R. CARPEN- TIER, a'citizen' of the United States,residingv at Denver, in the county of Denver and the State of Colorado,'hayej invented certain newand' useful Im rovements 1n Processes of Making 'Ferro-i ickel and Nickel-Steel} of which the following is a full, clear, and exact My invention relates to ores carrying copper, nickel and iron in the sulfid form and especially to the pyrrhotite ores such as are found in Sudbury, in the Province of Ontano, In the Dominion of Canada. These ores carry-from 1% to 6% copper and about the freefrom rock, from 50% to 60% iron.

"The present method of their treatment is ex ensiveand very wasteful in that the iron is 0st and. the matte to which the ore is 's1 nelted is diiiicult to treat as the copper and nickel must be se arated before the nickel can-be usedin temanufacture of ferron ckel or nickel-steel.

.To meet'these difliculties, and to render "the iron a source of profit I have devised the following rocessz' he pyrrhotitc carrying copper an nickel is freed as far as convenient from the accompanying ga'ngue, then crushed, if need be, and given an oxidizing roast in any Wellknown'furnace whereby nickel and iron are oxidized and the copper remains unchanged, while the sulfur passes fwhich are now essentially the purple iron ore, or blue billy of commerce,

off as sulfur dioxid. The sul'l'urous. forms may be used 1n the manufacture of sulfuric acid or'otherwise utilized. The roduct ol' 1 this roast is then treated by the iongmaids l'lenders'oniprocess, i. e., it is mixed with a proper percentage o'l common salt and given achloridizing roast and the chloridized copper leached, preferably with hot water, from the remaining ore. It the operation has been properly conducted, at least 95% of the copper and little or no nickel, may be extracted with hot water from the residues save that these residues will carry practically all the original nickel cnd'littlc, or no, copper. The small percentage of the original copper which may not be extracted by hot water because in the form of oxids, may be. recovered by leaching with a weak solution of hydrochloric acid, which may also dissolve a little nickel, but which can be recovered with the dissolyod cnppel. i in. extreme cases this Specification or Letters teat me. Application filed February 24, 1909 Serlial in. 479,775).

Patented m 18, {$09.

lo ss o f nickel found to be very small in amount. The principle oi. the process depends upon the factthat when the three metals,coipper as sulfid and nickel and iron as oXi s'are given a chloridizing roast, copper is chloridized and nickel and iron re main unchanged, and the copper is thus made solublein water. This process is one of such accuracy that notinore then one tenth of one per cent. copper or fifteen-hum dredths of one per cent. sulfur will remain in the residue. Alter this treatment the nickel-iron residue is'smel'tcd directly with or without other iron ores, but with proper fluxes for l'erro-niokel, or made into nickel steel, thereby saving the cost of separating:

the nickel by the present costly methods and the complete utilization of the iron.

Having thus described my invention, what .I. claim is:

1. The method of't'reeing suliid coppernickel-iron ores from their copper contents by oxidizing the nickel and iron sulfids and then chloridizing the copper sullid and leach- 'ing the some from the mass, leaving the nickel and iron oxids in the form ol the purple ore of con'imerce, and the smelting ot this purple ore for the production of ferronickel or nickel-steel, substantially as described.

2. The method of freeing; sullid coppern-ickeliron ores from their copper contents by oxidizing thev nickel and iron su'llids and then chloridiziug the. copper sull id, leaving the nickel and iron oxids in the lorrn oi the purple oreot commerce.

3. The method herein described which consists in giving to sullid copper-nickel-iron ores an oxidizing roast to bxidize the nickel.-

and iron, then giving it e ohloridizin roast to chloridize the copper sul'lid whereb the subscribcitin name.

FR llKlilN ll. (lARlt-lhl l li Witnesses:

M. A. hictonnon,

A. ll. l ciinsn.

copper is rendered soluble in Water Whi e the 

